How to Hold Down Mouse while Key is Pressed?

I am new to autohotkey and apologize for my lack of programming knowledge, but as stated in the title, I am trying to make it so while I hold down a certain key on my keyboard, the mouse will be held down at a certain location as well.

The problem I am having is that when I release the key on my keyboard (in this case the "up" key), the cursor is still kept down. Here is my code so far: